Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

Magnum speed mods??

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Old 07-11-2003, 10:08 AM
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SJN
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Default Magnum speed mods??

Hi guys.

Has anyone sanded the leading and trailing edges more sharply on the Magnum?

Does it fly/glide/stall the same way when you do these things ?
Any increase in speed ?

SJ.
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Old 07-11-2003, 11:55 AM
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John A
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Default Magnum speed mods??

Generally, pointed or blunt doesn't make a noticable difference in the speed. It will most definately make the stalls more vicious. From what I hear of the Magnum's relatively high stall speed, I wouldn't do it.
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Old 07-11-2003, 12:04 PM
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RampRat
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Default Magnum speed mods??

I sanded the leading edge on both my Magnums as the leading edge was a bit flat towards the wingroot. On nr.2 i put a lot of work into the vetical stabilizer. The leading edge was sanded to make it thinner, and the trailing edge was replaced with a tapered one.

Didn't notice much of a difference, ecept for less whistling, and that means less drag... ...but then again, i'm comparing to my first Magnum, and that one had a huge tuned-pipe and the original nose/cowling, and both would cause much drag and whistling...

I was planning to do the same with the horizontal stabilizer/elevator, but decided to leave it as is for now to see if the other mod made any difference...
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Old 07-11-2003, 05:40 PM
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SJN
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Default Magnum speed mods??

hmm...Ill just leave mine alone for now.. :-)

Thanks.
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Old 07-12-2003, 10:47 AM
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Jim Cattanach
 
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Default Magnum speed mods??

You can increase the performance of the engine by enlarging the manifold opening to exactly match the engine exhaust port.
The existing manifold opening is much to small.
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Old 07-12-2003, 11:30 AM
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SJN
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Default Magnum speed mods??

hmm..at the moment Im not even using the west engine......

since I put my 46 in it I like that it fly`s for 10 minutes, doesn`t burn plugs all the time, and this engine shuts down when I press the thottle cut switch...... It`s been ages since I lanst had to change a broken prop. Ofcourse the downside is that it doesn`t go as fast.....

SJ.
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Old 07-13-2003, 07:35 PM
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heligoode1
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Default Re:

If you want simple upgrade or mod, here is what you do.

If you want longer flight times, put a larger tank in it, or put a second tank in it.

If you want to peak out the performance of your engine,(regardless of what engine you use), install a BVM mixture control inside the fuse. Open the high end needle to about three turns out and then readjust the mixture with the mixture control. When you are inflight you can lean out or richen the mixture in flight like the big boys do.


If you would like to see a pic of the setup, look at my gallery.
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Old 07-14-2003, 06:04 PM
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Default Magnum speed mods??

the recent batch have flat edges at the roots, those little Chinese children are getting lazy
you wont notice a speed difference, however, my slower ( only for now ) reving GRRT is almost equal with the Wests which means that having my engine and pipe hidden is giving me a lot of advantage, i think i saw something that said average gains in racing, 7mph for the engine, 12 for the pipe, i'd agree with that for the speed i have compared to the RPM loss
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